Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plans and Stock-Based Compensation

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Equity Incentive Plans and Stock-Based Compensation
3 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Equity Incentive Plans and Stock-Based Compensation Equity Incentive Plans and Stock-Based Compensation
As of March 31, 2024, the Company had a remaining allocated reserve of 29,230,966 shares of its common stock for issuance under its 2021 Equity Incentive Plan (the “2021 EIP”), which provides for the granting of stock options, restricted stock units (“RSUs”) and stock appreciation rights to employees, directors, and consultants of the Company. As of March 31, 2024, the Company had an allocated reserve of 9,955,400 shares of its common stock for issuance under its 2021 Employee Stock Purchase Plan (“2021 ESPP”). As of March 31, 2024, the Company had not begun any offering periods for the 2021 ESPP.
Stock options
Activity under the 2021 EIP is set forth below:
Options Weighted-Average Exercise Price Weighted-Average Remaining
Contractual Term
in years
(In thousands) (Per share data) (Years)
Outstanding as of December 31, 2022
16,960  $ 0.54  7.3
Granted —  $ — 
Exercised (1,186) $ 0.26 
Forfeited or expired (385) $ 0.63 
Outstanding as of March 31, 2023
15,389  $ 0.56  7.0
Options vested and expected to vest as of March 31, 2023
15,389  $ 0.56 
Vested and exercisable as of March 31, 2023
10,800  $ 0.67 
Outstanding as of December 31, 2023
13,152  $ 0.61  6.2
Granted —  $ — 
Exercised (1,614) $ 0.18 
Forfeited or expired (144) $ 0.81 
Outstanding as of March 31, 2024
11,394  $ 0.67  5.9
Options vested and expected to vest as of March 31, 2024
11,394  $ 0.67 
Vested and exercisable as of March 31, 2024
10,897  $ 0.68 
The aggregate intrinsic value of options outstanding was $2.4 million and $2.3 million, respectively, as of March 31, 2024 and December 31, 2023. Intrinsic value of options exercised for the three months ended March 31, 2024 and 2023 was $0.2 million and $3.5 million, respectively. The total grant date fair value of options vested was $0.1 million and $0.3 million for the three months ended March 31, 2024 and 2023, respectively.
As of March 31, 2024, total unrecognized compensation cost related to options was $0.1 million related to 0.5 million unvested options and is expected to be recognized over a weighted-average period of 0.8 years.
For the three months ended March 31, 2024, there were no options granted.
Restricted Stock Units
The fair value of RSUs under the Company’s 2021 EIP is estimated using the value of the Company’s common stock on the date of grant.
The following table summarizes outstanding and expected to vest RSUs as of March 31, 2024 and 2023 and their activity during the three months ended March 31, 2024 and 2023:
Number of Shares Weighted-Average Grant Date Fair Value Aggregate Intrinsic Value
(In thousands) (Per share data) (In thousands)
Balance as of December 31, 2022
9,623  $ 4.47  $ 17,225 
Granted 4,180  2.11  8,819 
Released (400) 5.55  1,300 
Cancelled (948) 4.37  2,520 
Balance as of March 31, 2023
12,455  $ 3.65  $ 28,274 
Expected to vest as of March 31, 2023
12,455  $ 3.65  $ 28,274 
Balance as of December 31, 2023
20,066  $ 1.94  $ 7,978 
Granted 1,133  0.35  393 
Released (1,668) 2.41  444 
Cancelled (1,271) 1.92  480 
Balance as of March 31, 2024
18,260  $ 1.80  $ 8,319 
Expected to vest as of March 31, 2024
18,260  $ 1.80  $ 8,319 
The aggregate intrinsic value of outstanding RSUs is calculated based on the closing price of the Company’s common stock as of the date outstanding. As of March 31, 2024, there was $29.9 million of unrecognized compensation cost related to 18.3 million unvested RSUs, which is expected to be recognized over a weighted average period of approximately 2.9 years. As of March 31, 2023, there was $40.9 million of unrecognized compensation cost related to 12.5 million unvested RSUs, which is expected to be recognized over a weighted average period of approximately 2.9 years.
Earnout Shares–Employees
The Earnout Shares issuable to holders of employee stock options are accounted as stock-based compensation expense as they are subject to forfeiture based on the satisfaction of certain employment conditions. The estimated fair values of the Earnout Shares associated with vested stock options are recognized as an expense and determined by the Monte Carlo simulation valuation model using a distribution of potential outcomes on a monthly basis over the five-year earnout period. The portion of the Earnout Shares associated with unvested stock options are recognized as an expense and considers the vesting continuing employment requirements.
Stock-based Compensation Expense
The following sets forth the total stock-based compensation expense by type of award included in operating expenses on the statements of operations:
Three Months Ended
March 31,
2024 2023
(In thousands)
Restricted stock units $ 3,829  $ 4,058 
Stock options 60  750 
Earnout shares–employees
1,198  1,428 
$ 5,087  $ 6,236 
The following sets forth the total stock-based compensation expense for the stock options, RSUs, and earnout shares - employees included in cost of revenue and operating expenses on the statements of operations:
Three Months Ended
March 31,
2024 2023
(In thousands)
Cost of 3D Printer
$ 389  $ 194 
Cost of Support services
195  72 
Research and development 1,550  2,803 
Selling and marketing 1,054  1,495 
General and administrative 1,899  1,672 
$ 5,087  $ 6,236